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6(b) Planning File 2887: Request for a Conditional Use Permit, by CB Commercial, to allow attachment of cellular telephone antennas to the penthouse roof of Roseville Professional Center, located at 2233 Hamline Avenue. Chairman Wietecki opened the public hearing and requested Community Development Director Dennis Welsch to present a summary of the staff report dated May 14, 1997. Staff recommended approval of the Conditional Use Permit. John Hollenbeck, CB Commercial, presented maps displaying service areas for cell phones. Hollenbeck explained that antennas could be placed on penthouse facia or above penthouse. Chairman Wietecki asked why not place antennas on the city water tower and St. Paul Water Authority sites. John Hollenbeck explained service to the east would be shadowed by the city water tower itself. Member Rhody asked what was the impact of shadowing from the water tower and if two cell sites could be placed on the water tower. He was advised that sites must be placed every .75 to 1.0 miles, within a diameter of two miles. Member Harms asked what made this different from the current cell operations. John Hollenbeck explained digital phone systems. Current cell phones are analog, with up to 7,000 calls in any cell. Digital cellular would increase the capacity six times. Member Cunningham asked if placement of the antennas on the facia would reduce the shadowing problem. John Hollenbeck replied that it would increase the shadowing problem. Member Mulder stated a condition in the Conditional Use Permit should include take-down of the towers after end of use and within 12 months of non-use. There was no further public comment. Chairman Wietecki closed the hearing. Member Harms expressed concerns regarding cleaning and maintenance of the building and site. She asked if the building had been brought into code compliance. Chairman Wietecki noted that new technology may not be reflected in City 2